Cause:
Low hard disk space.NOTE: The error or errors displayed are incorrect. The error displayed should read "Installation of package pbeagent - 9.0.4 - 401.i 386 requires 95 MB of space (on the / file system)" with the PowerChute version number and space required based on the version being installed.
Required disk space

PCBE 9.1.1 – 75MB

PCBE 9.0.3 – 75MB

PCBE 9.2 – 85MB

PCBE 9.2.1 – 99MB

PCBE 9.0.4 – 95MB

Solution:
Remove files to increase the available hard disk space or add hard disk space to the system.